peb2265 ETC-unknow, peb2265 Datasheet - Page 31

• Manufacturer Part Number: peb2265
• Description: Channel Codec Filter With Iom -2 Interface Iom -2 Sicofi -2
• Manufacturer: ETC-unknow

3.3.4
Test-Loops
AGX
AGR
D-HPX
D-HPR
1)
2)
Semiconductor Group
Bit
In this case the transmit-path signal is attenuated 0.06 dB
In this case the receive-path signal is attenuated 0.12 dB
7
CR4 Configuration Register 4
4 bit field for selection of Analog and Digital Loop Backs
0 0 0 0:
0 0 0 1:
0 0 1 1:
0 1 0 0:
0 1 0 1:
1 0 0 0:
1 0 0 1:
1 1 0 0:
1 1 0 1:
1 1 1 1:
Analog gain in transmit direction
AGX = 0:
AGX = 1:
Analog gain in receive direction
AGR = 0:
AGR = 1:
Disable highpass in transmit direction
D-HPX = 0: transmit high pass is enabled
D-HPX = 1: transmit high pass is disabled
Disable highpass in receive direction
D-HPR = 0: receive high pass is enabled
D-HPR = 1: receive high pass is disabled
6
Test-Loops
5
ALB-PFI
ALB-4M
ALB-PCM analog loop back via 8 kHz (PCM) is selected
ALB-8K
DLB-ANA digital loop back via analog port is selected
DLB-4M
DLB-128K digital loop back via 128 kHz is selected
DLB-64K
DLB-PCM digital loop back via PCM-registers is
analog gain is disabled
analog gain is enabled (6,02dB amplification)
analog gain is disabled
analog gain is enabled (6,02dB attenuation)
4
digital loop back via 64 kHz is selected
31
no loop back is selected (normal operation)
analog loop back via PREFI-POFI is selected
analog loop back via 4 MHz is selected
analog loop back via 8 kHz (linear) is
selected
digital loop back via 4 MHz is selected
selected
Programming the IOM
AGX
3
AGR
2)
2
1)
D-HPX
®
1
-2 – SICOFI
PEB 2265
1997-07-01
D-HPR
0
®
-2